Device for swaging insertible saw-teeth



(N9 Model.)

N. H. WHEELER & N. M. NEWHOUSE.

DEVICE EOE SWAGING- INSBRTIBLE SAW TEETH. No. 364,877.

Patented June 14 u. ravens. Mo-U'ibogmphar. Wauhingion, no

I UNITED STATES.

* PATENT OFFICE.

NELS H. WHEELER AND NEIL M. NEVV HOUSE, OF CORVALLIS, OREGON.

DEVICE FOR SWAGING INSERTIBLE SAW-TEETH.

SPECIFICATION-forming part of Letters Patent No. 364,877, dated June 14, 1887.

. Application filed June 24, 1886. Serial No. 206.177. (No model.)

invented a new and useful Improvement in- .Devlces for Swaging Insertible Saw-Teeth, of

which the following is a specification.

Our invention is in the nature of a new machme or device for operation by hand,whereby old insertible saw-teeth which have become worn and unserviceable from use may be renewed or restored to shape and rendered serviceable by drawing, swaging, and roll-tempering the same.

It consists in the peculiar construction and arrangement of parts forming said device, which I will now proceed to describe with reference to the accompanying drawings, in which- Figure 1 is a side elevation with the handle of the lever broken off, and showing in dotted lines the different positions of the lever. Fig. 2 is an end elevation ofthe same. Figs. 3 and 4 are detached views in perspective of the swage-blocks A and B, shown in Figs. 1 and 2. Fig; 5 is a detail View of the pin for retaining the tooth in the swage-block while being acted upon. curing the .pin. Fig. 7 is the fulcrum-bolt for the lever 0. Fig. 8 is the clamping-bolt for holding the two parts of the swage-block together. Fig. 9 is a detail of the cam-headed lever. Fig. 10 is a view of the form of insertible saw-tooth that our device is intended to operate upon. Figs. 11 and 12 are keys for tightening the two swage-blocks in their locked connection to each other and sustaining the strain between them.

A is the main swage-block, in whose upper face is formed a groove or slot, 9 f, of a width and shape to receive the insertible tooth E. The other portion,B,of the swage-block is fastcned to A by a clamping-bolt, F, whichpasses through a hole, a, in block A, and througha slot, 0, in the block B, the slot 0' permitting the block B to be set higher or lower, according to the thickness of the saw-tooth. The upper end of the block B is slotted to'receive the swaging-lever O, which is formed with an eccentric or cam head, and which head, as well Fig. 6 is the holder for se-- as theend of the block B, are perforated to re ceive the fulcrum bolt a. The block A is formed with an offset or shoulder, d, and above this there are two flanges, i i, at the edges, between which the sides of the block B are seated and held. A lip, e, is also formed at the lower end of block B, which lip projects under the shoulder d of the block A. Between this lip e and shoulder d the tapered keys G G are driven from opposite sides to tighten up the two blocks in their proper relation to each other and to afford a broad bearing to carry the strain when block B is forced up and block A forced down by the action of the cam-lever.

D is a pin which fits a half-round notch in the tooth E, and affords ameans for holding it against slipping during the drawing and'swaging action of the lever. This pin is coupled at one end to and held by a holder, H, which passes through a hole, I), on the block, while the other end of the pin D is grasped by the thumb and finger of the left hand, the lever 0 being worked by the right hand.

In operating the device the swage-blocks, after being adjusted in relation to each other for the proper size of tooth, are firmly seated in a vise or special socket. The old tooth is then placed at a cherry-red heat in the groove g f, and the pin D is then laid across it, resting in the half-round notch. The outer end of the pin being then held by the fingers of the left hand, the leverO is with the right brought from the position shown in full lines successively through the positions shown in dotted lines, during which movement the cam-head of the lever draws and swages the old worn tooth to its proper configuration at the point, and at the same time gives it-a roll-temper, thus making theold and unservicea'ble tooth as good as new.

We prefer in constructing the device to make it entirely of steel; butin any case a hardened steel plate is detachably fastened in the bot tom of the groove or seat 9' f for the saw tooth.

Having thus described our invention, what we claim as new is-- I 1. The combination of swage-block A, having shoulder d and hole 0, the block B, with lip e and slot 0, the clamping-bolt F, and the eccentric-headed or cam-lever C, fulerumed to 4. The combination, with the two bloeksA 15 block 13, substantially as and for the purpose and B, connected together, substantially as dedeseribed. scribed, the former having a tooth-seat or 2. The combination of swage-block A, havgroove, 9 f, and hole I), of the holding-pin D 5 ing shoulder 0, hole 0, and toothseat g f, the and pin-holder II, arranged in the hole I), and

bloek13,withlipc and slot 0', and the eccentric the swaging-lever O, substantially as and for 20 headed or cam-lever G, i'ulerunied to the block the purpose described.

B, substantially as and for the purpose de- Signed and witnessed. scribed. ,1, IO 3. The combination, with the swage'blocks A B, connected by a clamping-bolt and having shoulder d and lip c, of the tapered keys G G lVitnesses:

and the swag-ing-lever O, substantially as and N. A. TiIoMrsoN,

for the purpose described. B. \V. Wl'LsoN. 

